Feeding attachment for drill-spindles.



R. MILNE.

FBEDING ATTACHMENT FOR DRILL SPINDLBS. APPLICATION FILED JAN. s. 1911'.

1,026,595. Patented May 14, 1912.

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Patented May 14, 19112.

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R. MILNE.

FEEDING ATTACHMENT FOR DRILL SPINDLES.

` APPLIOATION FILED JAN. 3, 1911. 1,026,595.

. 1. IMM" A 1 1 Il v/ A k IHIIIIII 1 F R. MILNE. PEBDING ATTACHMENT FORDRILL SPINDLES. APPLIUATION FILED 1111.3, 1911.

1,026,595. Y 1 Patented May 14, 1912.

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`R. MILNE. FBBDING ATTACHMENT FOR DRILL SPINDLES.

APPLICATION FILED JAN. 3, 1911.

Patented May 14, 1912.

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INVENTOR R. MILNE. FBBDING ATTACHMENT FOB. DRILL SPINDLES.

APPLIOATION FILED JAN. 3, 1911.

Patented May 14, 1912.

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R. MILNE.

TEEDTNG ATTACHMENT TOR DRILL SPTNDLTS.

APPLIOATION FILED JAN. 3, 1911. l

Patented May 14, 1912.

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'UNITED sTATEs PATENT orme.

ROBERT MILNE, OF ROCKFORD, ILLINOIS, ASSIG-NOR TO ROCKFOR-D DRILLING-MACHINE CO., OF ROCKFO'RD, ILLINOIS, A CORPORATION OF ILLINOIS.

FEEDING ATTACHMENT FOR DRILL-SPINDLES.

To all 'whom t may concern.'

Be it known that I, ROBERT MILNE, a citizen of the United States,residing at Rockford, in the county of Winnebago and State of Illinois,have invented certain new and useful Improvements in Feeding Attachmentsfor Drill-Spindles, of which the following is a specification.

The present invention relates more particularly to the mechanism forfeeding the drill by the hand of the operator, as is desirable when thework is faced, and in certain kinds of heavy and light drilling.

One object of the present invention is to assemble the mechanismsentering into the hand feeding of the drill spindle so that they are allwithin convenient reach of the operator and can, if desired, be operatedentirely by one hand.

Other objects of the invention are, to provide means for effecting aquick return movement of the drill spindle out of the work; to provide aleverage member to be grasped by the operator in actuating the mechanismfor feeding the spindle by hand, which leverage member will be of alarge and substantial nature, whereby suiiicient leverage can beobtained to easily and efflciently perform the various drilling opera=tions intended; to provide a gear connection between the leverage memberand the shaft which moves the drill spindle, so that an increased degreeof leverage is obtained upon the shaft, and hence an increased forceapplied to the spindle; to provide means for throwing this gearconnection out of operation when desired; and to provide means forthrowing and releasing the leverage member into and out of clutch withthe shaft, whereby the shaft maybe driven directly by the leveragemember.

Further objects of the invention are, to arrange the driving worm gearbelow the driven worm gear, thus utilizing the force of gravity to movethe driving worm gear out of mesh with the driven worm, and to enable areservoir for lubricant to be provided, in which the driving worm gearwill run; and to provide a trip mechanism which is within handy reach ofthe operator actu- Specication of Letters Patent.

Application filed January 3, 1911.

Patented May 14, 1912. Serial No. 600,551.

ating the leverage member, which trip mechanism is for the purpose ofreleasing the driving worm gear to allow it to be thrown out of meshwith the driven worm gear.

The invention further consists in the features of construction and thecombination of parts hereinafter described and claimed.

In the drawings, Figure 1 is al plan view of the mechanism of thepresent invention; Fig. 2, a view similar to Fig. 1, showing certainportions of the mechanism in section; Fig. 3, a face view of themechanism of the present invention; Fig. 4f, a plan view looking uponthe reverse side of the mechanism shown in Figs. 1 and 2; Fig. 5, asection on line 5-5 of Fig. 2, looking in the direction of the arrow;Fig. 6, a section on line 6-6 of Fig. 2, looking in the direction of thearrow; Fig. 7, a face view showing the driving worm in mesh with thedriven worm, and showing the construction and arrangement of the partsfor supporting the driving wormand the mechanism for releasing thedriving worm from the driven worm; Fig. 8, a view similar to Fig. 7showing the driving worm released from engaging position with the drivenworm; Fig. 9, a detail of the leverage member and the mechanism forclutching the leverage member to the shaft for raising and lowering thedrill spindle; Fig. 10, a detail on line 10-10 of Fig. 2 showing therack and pinion arrangement for raising and lowering the drill spindle;Fig. 11, a detail showing in operative position the mechanism forclutching the leverage member to the shaft; Fig. 12, a view similar toFig. 11, showing the mechanism in non-operative position; Fig. 13, adetail of the pinion which is actuated by the leverage member and whichmeshes with the internal gears; Fig. 14, an edge view of the parts shownin Fig. 13; and Fig. 15, a sectional view of the parts shownv inF ig.13.

In the operation of drilling machines, it

is frequently found desirable, and, in fact, necessary, to raise andlower the drill spindle by a manually operated means actuated by thehand of the operator. This is because of the fact that the poweroperated means are oftentimes not. sufficiently within the control ofthe operator to enable him to stop and to start the movements of thedrill spindle with enough accuracy. Heretofore in the construction ofdrill presses, so far as I am aware, this feeding by hand of the drillspindle has been a laborious and complicated operation, by reason of thefact that in order to accomplish it, it was necessary to t-hrow certainlevers in different positions, which required several movements of thehand of the operator; and it has been found inconvenient, orimpractical, to arrange the diferent members necessary to perform thismanually operated feed in such correlation to one another as to enablethem to be easily and quickly manipulated by the operator.

In the prior art, so far as I am aware, the leverage member grasped bythe operator in actuating the hand feed has been of a relatively smallnature, so that it was not of the nature required to enable the handfeed to be used under all of the circumstances which would arise, and,in fact, I believe that the hand feed of the drill presses of the priorart have almost entirely been utilized for the purpose of facing thework, as sui'icient leverage could not be obtained by them to renderpractical, heavy drilling by this means. ln all of the mechanisms forper forming this work, so far as I am aware, the variety of parts andtheir necessary correlation to one another required a plurality of smallfittings and fine adjustments, in order to secure them to the body ofthe machine, and consequently t-he danger of frequent disarrangementincreased by such construction.

It is the object of the present invention to obviate the objectionsabove recited and to increase the efficiency of operation of thisportion of the drill press, and such result is brought about by anarrangement of 1nechanism as follows: The mechanism of the presentinvention is applied to a drill press frame of any ordinary standardtype of construction. The parts entering into the composition of thedrill press frame structure are not shown in the present instance, noris the mechanism for rotating the spindle, inasmuch as the constructionand arrangement of this portion of the drill does not enter in any wayinto or affect the operation of the parts of the present invention. Theonly parts illustrated at this time are the mechanisms for manuallyfeeding the drill spindle, a portion of the drill spindle, and t-hegears for actuating the driving worm.

The mechanism of the present invention is positioned in propercorrelation to a drill spindle 1G of any ordinary and well known type,which is provided, as usual, with a rack surface 17. Meshing with therack surface 17 is a pinioned surface 18, secured to and carried by astub shaft or stem 19. The shaft 19 is journaled within a block orcasting 20, through which the drill spindle extends; and said shaft iscomposed of a somewhat enlarged central portion 21, eX- tending out fromwhich are reduced portions 22 and 23. The end portion 22 has affixedthereto, by suitable means, a handle or grip 24 of the ordinary and wellknown type generally employed upon drilling machines for manuallyfeeding the drill spindle, and is usually employed for the purpose ofeffecting a quick return of the drill spindle. The end 23 of the shaft19 has loosely mounted thereon a leverage member 25, which, in the formshown, is in the nature of a relatively large hand wheel. The hand wheelis provided with a hub 26, which, as best shown in Fig. 5, is mountedupon the end portion 23 in eccentric relation thereto; and the hub 26has loosely mounted thereon a ring gear 27, which is concentric to saidhub and hence eccentric to the end 23 of the shaft 19.

The ring gear 27 meshes with an internal gear 2S formed on the interiorof a ring 29; and the outer periphery of the ring 29 is formed with aseries of ratchet teeth 30. This ring 29, it is understood, isessentially an idle ring and is not normally connected in any manner tothe shaft 19. The ring is held in position and guided in its rotativemovements through the medium of a housing 31, which is more clearlyshown in Fig. 2, and is suitably arranged and constructed to be attachedto the casting 20. The housing 31 is provided with a slot or opening 32,through which extends a dog 33, which is pivotally mounted upon a lug 34formed on the housing 31. The dog 33 acts as a loclr to prevent rotativemovement of the ring 29, the function and reason for which will bebrought out more clearly hereinafter.

The ring gear 27 is adapted to be secured to a ring gear 35 by means ofpins 36, more clearly shown in Fig. 15, or other suitable connectingmeans. The gears 35 and 27 are in direct alinement with one another andare lying side by side; but, as more clearly shown in Fig. 14, it isdeemed expedient to arrange the teeth of these two gears so that theyare staggered to one another'. This has been found to give an easiermovement to the gears than when the teeth are arranged in directalinement with one another. The gear 35 meshes with an internal gear 37,best shown in Figs. 2 and 6. The internal gears 23 and 37 are preferablyformed with an uneven number of teeth, the gear 37 having one more tooththan the gear 28. This is in order to provide for a relative movementbetween the ring gear 27 with the internal gear 37. The internal gear 37is formed integral with a ring-like member 38, provided with a hub 38a;and on the outer periphery of the member 38 is formed a worm gear 39,which will hereinafter be termed the driven worm gear of the feedmechanism. The member 38 is secured to the central portion of the shaft19 by a pin 40 passing through the hub, or by other suitable lockingmeans.

Keyed to the end of the shaft 19 is a ringshaped toothed member 41,which, as shown more clearly in Figs. 2 and 3, is lying in closeproximity to the hand wheel 25. Pivotally secured to the hand wheel 25is a doglike member 42 provided with an oEset iingered end 43, adaptedto engage with the toothed member 4l. The dog-like member is normallyheld to maintain its lingered end 43 in engagement with one of the recesses of the member 41 by a spring 44 attached to the hand wheel. Meansare provided, however, which are best shown in Figs. 11 and 12, formaintaining the doglike member out of operative position. Said meansconsist of a knob 45, which is slidably mounted upon the end 23 of theshaft 19, and is provided with a beveled face 46, terminating in a bead47. As will be seen from a study of Figs. 11 aand 12, when the knob isslid inward upon the end 23 of the shaft 19, the beveled surface 46 willact to force the fingered end of the dog 42 out of engagement with therecesses in the member 41 and so break the connection between the handwheel and the member 41.

From the foregoing description, it--will be seen that there are twomethods provided for connecting the hand wheel 25 to the shaft 19. Theiirst is through the medium of the eccentrically mounted gear rings andthe internal gears. This method is utilized for heavy drilling orfacing, where a substantial leverage is necessary to force the drillthrough the work. Its operation is as follows: The dog 33 is thrown intoengagement with the ratchet teeth on the outer periphery of the ring 29,as shown in Fig. 5. The hand wheel is then revolved, which revolution,of course, revolves the hub 26, since these parts are integral orconnected in some way with one another. As heretofore stated, the hub 26is eccentric to the center of the shaft 19, hence, as said hub isrevolved around the center of this shaft, it will carry with it the gearring 27. Although this ring is not keyed or secured in any way to thehub, but is carried along simply because of the eccentric mounting ofthe hub, and because of the concentric position of the ring to the hub,there is no other movement possible for the ring with respect to thecenter of the shaft 19 except to follow the hub in its circular movementabout the center of said shaft.

The gear 27 is meshing with the teeth of the internal gear 28 of thering 29, and as shown in the drawings, meshes in a manner so that itforms in effect a planetary gear. As heretofore stated, this ring 29 isheld against revolution through the engagement o-f the dog; hence, asthe ring 29 passes over the toothed surface of the internal gear 28,said gear 27 will be revolved about the center of the hub 26. This isbecause of the fact thatthe gear 27 is loose about the hub 26 and istraveling over the surface of a fixed gear. Through the rotation of thegear 27, a movement will be imparted to the gear 35, which movement willbe about the center of the shaft 19 and also about the center' of thehub 26. It is understood that the rotation of the gear 27 will be in areverse direction from the rotation o-f the hand wheel 25.

The movement imparted to the gear 35 will rotate the ring-like member38, owing to the engagement of the teeth of the gear 35 with theinternal gear 37. The member 38 is fixed to the shaft 19 by the pin 40,as heretofore stated. Hence, a revolution of this member will rotate theshaft 19 andv actuate the pinion 18, which operates upon the rack 17 andacts to lower the drill spindle. lVhen the dog 33 is thrown out ofengagement and the hand wheel revolved, the gears 27 and 35 will becarried around by the rotation of the hub 26 and will be revolved in areverse direction from the rotation of the wheel, movement beingimparted to the gears by their riding over the teeth of the gear ring37, which is fixed. This imparts movement to the ring 29 in a reversedirection from the rotation of the hand wheel, but no movement isimparted to the shaft 19 by the operation of the hand wheel during thetime the dog 33 is out of engageing position with the teeth 30 of thering 29. Exactly the reverse conditions are brought about by thethrowing of the dog out of engaging position than when said dog is inengaged position. In the disengaged position, the gear 27 and the ring29 will revolve in a reverse direction from the rotation of the handwheel, and the gear 35 will revolve about the center of the hub 26, byreason of its travel over the teeth of the internal gear 37; but nomovement will be imparted to the gear 37 because of the fact that thereis no resisting surface presented for the gear 27 to engage with, thering 29 being entirely loose and revolving in unison with the pinions.

lVhen the dog 33 is out of engaging position with the teeth 30, thehandle 24 may be used by the operator to give a quick return to thedrill spindle. Then the handle 24 is used, it, of course, imparts motiondirectly to the shaft 19. This will turn the member 28 and will causethe gears 27 and 35 to be revolved therewith; but such revolution willbe solely about the hub 26 as an aXis, a revolution of the hub 26 willtake place around the shaft 19; and no movement of these gears about thecenter of the hub 26 will take place at this time. The gear ring 37, thegears 35 and 27, and the ring 29 will all rotate in unison; and the handwheel 25 will accordingly be stationary with respect to these parts..Vhen the handle 24: is to be used for a quick return of the drillspindle, it will be necessary to throw the dog 33 out of engagement inorder to use this handle, since the ring 29 would be rotated in adirection, when the drill spindle is returned, to have the dog 33 lockwith the teeth 30 of said ring and a stopping of the ring would result.But by throwing the dog 33 out of engagement, the handle 24 can then beused for a quick return movement, since for this kind of work,sufficient leverage can be obtained by the handle to accomplish thisresult.

The leverage obtained when the ring gears and internal gears areoperating to rotate the shaft 19 is relatively great. A relatively lightleverage can be obtained by using the handle 2st in the mannerpreviously described, or by connecting the hand wheel 25 to the shaft.rThis latter connection is made by throwing in the dog-like member 42 sothat its lingered end L13 engages one of the recesses in the member 41,thus locking the hand wheel and this member together; and since themember 41 is keyed to the shaft 19, a revolution of the hand wheel willimpart motion directly to the shaft. The hub 26 will be revolved, andthis will revolve the gears 27 and 35 about the center of the shaft 19simultaneously with the hand wheel. The ring 29 will be revolved in areverse direction by this movement and the dog 33 will ride over theteeth 30. Although a rotative action will be imparted to the gears, asheretofore described, there will be no rotative movement imparted to theshaft 19 by the rotation of these gears; but a rotation will be impartedto the shaft directly by the hand wheel 25, and, as heretofore stated,since this hand wnecl is of a substantial diameter, a good and eflicientleverage can be obtained by the use of said wheel, which will serve tofeed the drill through medium heavy work, or during the facingoperation.

Meshing with the driven worm 39 is a driving worm 48, which is driven bysuitable miter gears 1-9. The gear 48 is housed wit-hin a swingingbracket 50, best shown in Fig. 6; and the housing is formed to provide awell 51, in which the gear 48 travels, and said well is adapted tocontain a lubricant for the purpose of keeping the gear 48 in aconstantly lubricated condition. This is made possible in the presentconstruction, owing to the fact that the parts are so arranged as toenable the driving worm to be located below the driven worm, in place ofat the side.

The bracket 50 is provided with a plate 52, provided wit-h a slot 53,into which is entered a pin 54. The relation of the pin to the slot, asmore clearly shown in Figs. 7 and 8, is such as to allow of movement ofthe lug with respectl to the pin. The lug terminates in a finger piece54a; and the plate is further provided with a protuberance 55,which isadapted to be engaged by a hook 56 formed on a swinging arm 57. Theswinging arm, as shown, may be provided with a finger piece 58 at eitherend thereof, so that the same may be within handy reach of the operator,without his removing his grasp from the hand wheel 25.

The op-eration of the portion of the device just described is asfollows: Then the arm 57 is swung to release the catch from engagementwith t-he protuberance 55, t-he swinging bracket 5() will fall bygravity until the pin 54C strikes the end wall of the slot 53, when themovement of the parts will be checked and they will remain in theposition shown in Fig. 8. To restore the parts to normal position, theoperator merely presses up on the finger piece 54a, which shoves theswinging bracket into the position shown in Fig. 7.

From the foregoing description, it will be seen that a hand controlledmovement can be imparted to the spindle through the rotation of the handwheel, which, if a great leverage is desired, as is the casein facing orin heavy drilling, it can be had by the arrangement of the internalgears and the planetary gears meshing therewith. Tf a feed requiring alighter degree of leverage is required, the spindle can be fed byconnecting the hand wheel directly to the shaft which operates thespindle. This latter will, of course, be a quicker movement than theformer; and if but slight leverage is necessary, will perform the work.Thus light or heavy hand drilling can be accomplished without anyrearrangement of the mechanism and without moving a large assortment oflever or analogous devices.

I claim:

1. In a device of the class described, the combination of a drillspindle, a rack on said spindle, a shaft provided with a pinion meshingwith said rack,4 an internal gear fixed on said shaft, an internal gearloose on said shaft, said internal gears having a dierent number ofteeth, a hand wheel provided with a hub loosely mounted eccentrically onsaid shaft, ring gears loosely mounted on said hub and joined to rotatein unison and meshing with said internal gears, a series of ratchetteeth upon the outer periphery of the loose internal gear, and a dogheld against movement with respect to said gears and adapted to bethrown into and out of engagement with said ratchet teeth, substantiallyas described.

2. In a device of the class described, the combination with a drillspindle, a rack on said spindle, a shaft provided with a pinion meshingwith said rack, a hand wheel loose on said shaft, a planetary gearconnection between the hand wheel and shaft, means for making andbreaking said gear connection between the hand wheel and shaft, atoothed member secured to said shaft, and a dog carried by the handwheel adapted to be thrown into engagement with said toothed member,whereby the shaft may be driven directly by the hand wheel when theconnection between the hand wheel and planetary gear is broken,substantially as described.

3. In a device of the class described, the combination of a drillspindle, a rack on said spindle, a shaft provided with a pinion meshingwith said rack, a hand wheel loose on said shaft, a planetary gearconnection between the hand wheel and shaft, means for making andbreaking said gear connection between the hand wheel and shaft, atoothed member secured to said shaft, a dog carried by the hand wheeladapted to be thro-wn into engagement with said toothed member, wherebythe shaft may be driven directly by the hand wheel when the connectionbetween the hand wheel and planetary gear is broken, and a shiftablemember for moving and holding said dog out of engagement with saidtoothed member, substantially as described.

4f. In a device of the class described, the combination of a drillspindle, a rack on said spindle, a shaft provided with a pinion meshingwith said rack, an internal gear loose on said shaft, an internal gearfast to said shaft, said internal gears having a different number ofteeth, a hand wheel loose on said shaft, pinions rotated by said handwheel traveling eccentrically with respect to said internal gears andlocated to move in unison, means for making and breaking the drivingconnection between the pinions and the internal gears, a toothed membersecured to said shaft, and a dog carried by the hand wheel adapted to bethrown into engagement with said toothed member, whereby said shaft isdriven directly by the hand wheel when the connection between the shaftand internal gears is broken, substantially as described.

5. In a device of the class described, the combination of a drillspindle, a rack on said spindle, a shaft provided with a pinion meshingwith said rack, an internal gear loose on said shaft, an internal gearfast to said shaft, said internal gears having a different number ofteeth, a hand wheel loose on said shaft, pinions rotated by said handwheel traveling eccentrically with respect to said internal gears andlocated to move in unison, means for making and breaking the drivingconnection between the pinions and the internal gears, a toothed membersecured to said shaft, a dog carried by the hand wheel adapted to bethrown into engagement with said toothed member, whereby said shaft isdriven directly by the hand wheel when the connection between the shaftand internal gears is broken, and a shiftable member for moving andholding said dog out of engagement with said toothed member,substantially as described.

6. In a device of the class described, the combination of a drillspindle, a rack on said spindle, a shaft provided with a pinion meshingwith said rack, an internal gear fixed to said shaft, an internal gearloose on said shaft, said internal gears having an unequal number ofteeth, means for locking and unlocking the loose gear of said internalgears, pinions loose upon the shaft and located to rotate in unison withone another meshing with said internal gears, a hand wheel loose uponthe shaft for rotating said pinions, a toothed wheel keyed to the shaft,and a dog carried by the hand wheel adapted to be thrown into engagementwith said toothed wheel, whereby the shaft may be revolved directly bythe hand wheel when the loose internal gear is unlocked, substantiallyas described.

7. In a device of the class described, the combination of a drillspindle, a rack on said spindle, a shaft provided with a pinion meshingwith said rack, an internal gear fixed to said shaft, an internal gearloose on said shaft, said internal gears having an unequal number ofteeth, means for locking and unlocking the loose gear of said internalgears, pinions loose upon t-he shaft and located to rotate in unisonwith one another meshing with said internal gears, a hand wheel looseupon the shaft for rotating said pinions, a toothed wheel keyed to theshaft, a dog carried by the hand wheel adapted to be thrown intoengagement with said toothed wheel, whereby the shaft may be revolveddirectly by the hand wheel when the loose internal gear is unlocked, anda shiftable member for moving and holding said dog out of engagementwith said toothed member, substantially as described.

8. In a device of the class described, the combination of a drillspindle, a rack on said spindle, a shaft provided with a pinion meshingwith said rack, a hand wheel loose on said shaft, a planetary gearconnection between said hand wheel and shaft, including internal gears,means for making and breaking said gear connection between the handWheel and the shaft, means for locking out of operative position,substntially as said hand Wlieel to said shaft, whereby said described.

shaft may be revolved directly by said hand ROBERT MILNE Wheel When theconnection between the internal gears and hand Wheel is broken, andlVitnesses:

a shiftable cam faced member for moving WM. P. BOND, and holding saidhand Wheel looking means MARY R. FROST.

Gopies of this patent may be obtained for ve cents each, by addressingthe Commissione of Patents.

Washington, D. C.

